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2 years ago

For something to combust, it must have ____________.

Chemistry

2 answers:

Wewaii [24]2 years ago

8 0

The answer would be B

docker41 [41]2 years ago

6 0

$╰┈➤\: \huge\color{pink}{\bold{Answer}}$

For something to combust, it must have Oxygen

A. Carbon dioxide
B. Oxygen
C. Water
D. Nitrogen

$\: \: \:$

$╰┈➤\: \huge\color{pink}{\bold{Explanation}}$

We don't have to keep lighting a campfire, it just keep burning

To summarize, for combustion to occur three things must be present: a fuel to be burned, a source of oxygen, and a source of heat

$\: \: \:$

So choose letter B

$\color{pink}──────────────────────────────$

$\mathfrak \red{ - \: Cherrrry \: Red}$

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svet-max [94.6K]

True I think I’m not for sure

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3 years ago

Read 2 more answers

A 6.000L tank at 19.2°C is filled with 18.0g of carbon monoxide gas and 10.6g of chlorine pentafluoride gas. You can assume both

Jobisdone [24]

Answer:

Total pressure: 2.89 atm

Mole fraction CO: 0.88

Partial pressure CO: 2.56 atm

Mole fraction ClF₅: 0.12

Partial pressure ClF₅: 0.33 atm

Explanation:

We should apply the Ideal Gases Law to solve this:

P . V = n . R . T

We need n, which is the total moles for the mixture

Total moles = Moles of CO + Moles of ClF₅

Moles of CO = mass of CO / molar mass CO → 18 g/28 g/mol = 0.643 mol

Moles of ClF₅ = mass of ClF₅ / molar mass ClF₅ → 10.6g/ 130.45 g/m = 0.0812 mol

0.643 mol + 0.0812 mol → 0.724 moles in the mixture

So we have the total moles so with the formula we would know the total pressure.

P . 6L = 0.724 mol . 0.082L.atm/mol.K . 292.2K

P = ( 0.724 mol . 0.082L.atm/mol.K . 292.2K) / 6L

P = 2.89 atm

Mole fraction is defined as the quotient between the moles of gas over total moles, and it is equal to partial pressure of that gas over total pressure

Moles of gas X /Total moles = Partial pressure of gas X/Total pressure

(Moles of gas X / Total moles) . Total pressure = Partial pressure of gas X

Mole fraction CO = 0.643 / 0.724 = 0.88

Partial pressure CO = 0.88 . 2.89 atm → 2.56 atm

Mole fraction ClF₅ = 0.0812 / 0.724 = 0.12

Partial pressure ClF₅ = 0.12 . 2.89 atm → 0.33 atm

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3 years ago

What do methanol (CH2O), ethanoic acid (C2H4O2), and glucose (C3H6O3) all have in common?

tatyana61 [14]

Answer:

Explanation:

Carbohydrates are compounds containing carbon, hydrogen, and oxygen. Therefore, a is true.

An empirical formula is the simplest ratio of atoms present in a compound. Therefore, C2H4O2 and C3H6O3, (if you simplified them like you would a fraction) would be CH2O. Therefore b is correct,

They also have the same % composition, with a ratio of 1 carbon : 2 hydrogen : 1 oxygen. Therefore, c is correct.

Since a, b and c are all correct, the answer is d, all of the above are true.

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4 years ago

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3 years ago

The melting point of the metal potassium is 63.5c, while that of titanium is 1660c. what explanation can be given for this great

kiruha [24]

The melting point of potassium = $63.5^{0}C$

Melting point of titanium = $1660^{0}C$

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3 years ago